1868 Sc 24 6th Definitive Issue of Russian Empire

1868. 6th Definitive Issue of Russian Empire.
Catalogs: Standard Collection 24.
Issued on: 1868.
Perforation: frame 14½.
Printing: Typography.
Size: 18.1 x 24.1 mm.
Colors: Black, green.
Face value: 3 Russian kopek.